Metal lamp post



Oct. 11, 1932.

J. F. NE PAGE METAL LAMP POST Filed Sept. 29. 1928 INVENTOR a 6 r 9 I 76 3 2 w 3 =2 j w n w w O a r fi a 3 2 -5 8. 4 A u. 4 Bl 8 I m. I 443 w; A M 6 2 IT /V. E a w M a c V I s 1 4 m x. w

pguslus 1". Nefizgg 072w! a MM ATTORNEY Patented Oct. 11, 1932 ausrns 1*. NE Peeaor SEATTLE, wAsrirnG-Ton, essence {to NE IEAGEJMCKENNY co.,- or SEATTLE; wesrrrn-sron, A conr'onerron or wAsErNG'roN METAL LAMP ros'r' Applicaticn fiied September as, 192s. serial no. 309,242.

My invention relates to' improvements" in metal polesand posts in 'generaland particularly to metal lamp posts of artistic design, adapted to be erected in sections and particularly'suitable as ornamental street lighting standards; f p

Attempts have been made heretofore to devisea satisfactory sectionalized ornamental lamp post comprising a metalbase and cap: ital, and a pressed metal shaft; and many ingenious fastening means have been nsd to hold the assembled sections together and to anchor the base of the lamp post to its foundation. Lugs extending radially outward from the cast metal base have been found ina adequate as anchoring means because of the liability to breaking of both the lugs themselves and the skirt of the base opposite the lugs in case of impact from vehicular collisions, unless the base is cast of steel or other metal of high tensile strength.

It is desirable, however, to use either cast iron or bronze for the base because ofthe ease with which the ornamental embellishments be cast, and because of the smoothsurface finish obtained by the use of thesemetals. Another reason for using cast iron is because it is less expensive than the other metals that may be used for this-purpose.

/Vher other base fastening means have been used the resulting complications have been found undesirable especially in the matter of replacing lampposts that have been damaged in collisions.

The principle object of my invention is to provide a sectionalized metal lamp post that may be readily assembled sectlon by section during the process of erectlon.

Another object is-to provide improved means in the construction of the base section ofmetal lamp posts whereby the same is'reinforced to withstand: greatly increased tension stresses, thereby enabling-it tobegmade of relatively inexpensive cast metal.

A further object resides in providing a strong and readily, accessible means T of fasttening the base section of meta-l lamp posts V and the lilre'to their foundations.

additional object consists of providmg means of reinforcing; the shaft member ends secured to a steel :of sectionalized metal posts or similarstruc-l I tures whereby the same is strengthened and the cost of manufacture reduced.

These and other objects and dvamages. will be apparent from the following description in connection with: the accompanying drawing, in which like reference numerals indicate the same parts throughout the differentviews, and in which; v Figure 1 is an'elevation of an ornamental lamp post embodying the invention.

Figure 2 is a sectional elevation of the same drawn to a larger scale,.parts being broken away.

Figs. 3, 4 and 5 are sectional views of Fig. 2taken at AA, B-B, and CC, respec tively. v 1

Fig. 6 is a detached plan view of the rod spacing and stiffening plate. 1Q

Referring to the drawing, the ornamental .lamp post? is shown made upofareinforced base member 8, preferably of cast iron, a reinforced shaft member 9, which may be constructed of sheet iron, steel, bronze or other material, and capitol or top'member 10,

usually made of cast metal of a'kind suitable for the purpose. A glass lamp canopy 11 and a suitable lamp socket and appended devices,not shown, are adapted to be supported by and secured to top member 10.

Basecasting 8 is reinforced against tension resulting from high .wind velocities, earthquakes, impactsfrom' collisions and the like, by means of reinforcing rods 12 having 7 eye-s13 formed at. one end, and their other it is placed in the mould and then weldingthe' 5 plate 14, preferably rods to the steel plate. Ribs 1 6 are' 'pro'vided to stiffen the castingand to position rods 12"" which areipa'rtially 'imbedded therein as indicated clearly in Fig; 5.

In manufacturing the reinforced base sec-Z tion, a" mould of the section is made in the foundry by means of a. suitable pattern, pref- V erably with the small end up so the perforated anchor plate 14 may be positioned on the top of the interior green sand core. The plate, being larger thanthe end of the core, obviously will be imbedded in the top of the casting; The reinforcing rods 12 are then part1y imbe'dded in. corresponding lengthwise. rints in said r'een sand core with their I b upper ends inthe perforations in said plate bestressed in tension, due to the highertem 14 and with their eye ends 13 positioned for embedment preferably intheheavy,cast, ex-

terior anchoring lugs 17 After closing the mould the molten metal is poured into the same thus imbedding the plate and eye ends of the rods in the casting and partly imbedding rods 12 in ribs 16. After themetal has solidified and before it has cooled, the small end of the casting is uncoveredto eX pose plate 14 to which rods 12 are then readily'welded. Upon cooling the steelrods will say cast iron for the body portion 15 and steel for rods 12, is well adapted to withstand com- .pression strains because cast iron has a. high compressive strength, and likewise to withstand tension strains because the reinforcing rods'have a high tensile strength. j V

The pressed metal shaft member9 is reinforced by longitudinally disposed rods 18.. fixedly attached thereto near their lower extremities, preferably by welding or brazing a as illustrated at19; and slidably attached at other points throughout. their length by.

means of straps 20. plate 21 isin turn fixedly secured to rods 18, usually by welding. It is the purpose of this plate to position rods 18 and equalize the stresses between them, thus stiffening the shaft at its lower extremity. The end projections of rods l8are'provided with threads22 and nuts 2'3, 24, 25

and 26, which constitute the means ofremovably fastening the three principal elements together as hereinafter described.

In erecting a lamp post embodying the invention, it is-usually desirableto firstiposition base 8 on foundation 27 in which bent anchor- 1 ing bolts 28 have been cast in the usual way.

The bolts-are so spaced thattheir threaded ends pass through holes-29 provided in lugsf plumbedand grouted in, and thegroutin'g has set, nuts 30 are tightened against lugs 17 thus Securely yet removably faStQningth-Qbase o; e foundation.

- 7 assess;

and'th'e aforesaid top member. Thisis done .4

by adjusting'nutsi 23 to align'the center line of the top member with the center line of the shaft, care being taken to provide a space 31 .betweenthe end of shaft 9 and top 10 sufli- 1 cient to provide for the unequal expansion of the shaft and reinforcing rods 18. This space is particularly important where steel rods are used to reinforce a bronze shaft, because of their unequal rates of expansion and contraction. When the adjustment of nuts 23 is completed, nuts 24 are run up tight on spring washers32, the n uts being readily accessible throughthe open throat of. top- 10,

shownby dotted lines in Fig.2 The downwardly'projecting skirt 33 conforms to, and

snugly fits around the top of shaft 9, thus serving to prevent theentrance ofmoisture and likewise to position thetop laterally with reference to the shaft, Shaft 7 is positioned .laterally'at its'lower extremity by means,v of

projection 33 of base 8 which conforms to the inner wall of the shaft.v

.Before shaft9 and appended top member 10 are positioned on base 8, nuts 25 are so ad usted that they will maintain the shaft ma vertical position and fixedly secure the shaft member to the base. The assembly of these members is completed by tightening nuts 26 against spring washers 34 the'same being readily accessible through opening 35 which is .r'emovably. covered bydoor 36 normally secured to base 8 by means of cap screwsi37. V

Ap'ertures 38, 39 and 40 are provided in sea plates 14 and 21 and inthe base of top member 10 through which electrical conductors may be drawn to supply current to the light unit previously mentioned.

Ample space is provided within the in terior of base 8 for underground conduits,- cables, pot heads, transformers vor other electrical equipment incident to the operation of ornamental street lighting systems. None of the electrical items, 'just'mentioned, are

shown in the drawing as they are not a part of the invention.

The lamp post asseinly is completed by adding the lamp, not shown, and the desired glass lamp canopy 11. Nuts 30 are usually painted with tar or an asphaltum compound and buried'under the top layer of side-walk concrete 41, the top surface of which makes .a neat joint with the lower side wall of base "8 at 42.- This construction prevents. the." p p p .loosening of nuts 30 which might otherwise I 17 for that purpose. Afterthe base has been occur as the result of vibration'incident to heavy vehicular trafiic, the passage of street terminal was of :ei 1 f rr i ls the Princ pal mem ers out; l m'p postsw er by 1 ghter nd ess. xpe sive mat r als he u ed, t u

educing the c st. at manu actur imp ifymgthe lnethodaofc nst uct n an prov c a Having thus describedimyinvention, what a I claim and desireto have protected by Let- I ..P&tBI iSR r 1. .In a sectional metallamp post, a hollow base section of cast metal, ribs extending lengthwise of said base section and projecting inwardly from the inner wall thereof, and reinforcing rods extending lengthwise within said base section from bottom to top thereof, said rods being imbedded in the in ner edges of said ribs and means for anchoring the ends of said rods by casting thesame integral with the top and bottom portions respectively of said base.

2. In a sectional metal lamp post, a hollow base section of cast metal, a plurality of inwardly projecting ribs extending lengthwise of the walls of said base section, reinforcing rods extending lengthwise within said base section and partly imbedded in the inner edges of said ribs, means for anchoring one end of said rods by casting them integral with the base, and means cast integral in the opposite end of said base for fixedly anchoring the other ends of said rods.

3. In a sectional metal lamp post, a hollow metal base, convergent from the bottom up wardly, outwardly extending lugs integral with said base for receiving anchor means, reinforcing rods extending lengthwise of said v base along the inner walls thereof, the bottom ends of said rods being bent outwardly and having eye members embedded in said base lugs and means cast integral with the upper end of said base and having the upper ends of said rods securely anchored thereto.

4. In a sectional metal post, a hollow base section of relatively thin cast metal having a plurality of interior longitudinal ribs of relatively great compressive strength and provided with an ornamental exterior, and

a reinforcing rods of relatively great tensile strength extending lengthwise of, and partly imbedded in the edges of said ribs andmeans cast integral with said base for anchoring the top and bottom ends of said rods to the respective ends of said base.

5. In a sectional metal post, a hollow metal base of downwardly expanding shape, outwardly extending perforated anchor lugs formed at the bottom of said base, reinforcing rods extending lengthwiseof, andspaced-i at intervals around the inner walls of the same, outwardly bent portions} on the bot.- toms of said reinforcing rods having eye members. cast within said-lugs inregistrat onwith-the perforations of the lugs, anda plate castjmetal base section,a plurality of longitud inal reinforcingjrods spaced-around the:

v inner wallsof; said base and; extending. from 7 top, tolbottom of the same, means-for secure ing onelendyof isaid rods bycasting thesame-i r in; said base, and meansfor securingtheot-her i end of said rods to the opposite end of base after the, base is cash-and the molten metal is solidified'but beforeit has cooled;

8, ,Themethod of reinforcing'cast metal I seBtiOns of ornamental street lighting standards, which consists; of, positioning an annular anchor plate having a. plurality ofv spacedapart holes; at one end.ofa.-mold,

whereby the same will be embedded in the casting around its-exterior edge, andso positioning a plurality of longitudinal freeinforcing; rods that the same: will be. spaced aroundand Partly; embedded in the. inner wall-of; said mold: with one of their -ends,

passing through the holesvini said plate and: with their other ends positioned for embeds ding in substantial. SGCtiOIlSOfJthB casting-at the end opposite that in which the plate is to,.be secured; and then pouring molten metalintothe ,mold, and welding-the ends of said; rods tosaid saidinetal,

a 9. The method of reinforcingzcast; metalz sections for:streetlightingstandards, which consists in providing av-mold for. the section; supporting a perforated anchor'plate so: that; its edgesw-ill be embedded in the: section at-v the upper end of the mold, supporting a plurality of, reinforcing rods: lengthwise within saidimold with their upper ends in the perforations in said plate and their maj or: portions positioned for vpartial embedmentin theinner wall of thecast-section and their plate after the solidification; of-- lower ends positioned for embedment in the lower GIldSZOf: the section to be cast,- their pouring molten I metal. into the; mold and then-weldingqthe upper ends. of theerods to said, plate) after the solidification of the; metal.

. 10. In a-sectional'metal lamp postahollow basesection, L a reinforced shaft section comprising: a tubular shell, a pl=urality of rodsextendinglengthwise within and adjacent the walls-of;said shell, fixed fastening means :se-i

curing said rods to; Saidwalls hear-the lower end of said shell, guides slid'ably connecting said rods with said walls above said fixed 'fastenings,and means-onlthe' lower ends ofsaid rods for adjustably -aligning said shaftsection with and removably 'securing the same tosaid base. 1 '11. In a sectional metal lamp post having t a base mounting, a reinforced shaftseCtion Comprising the combination of a tubular shiell, a plurality of rods'adjacent the inner walls of saidshell, means for spacing and for equalizing the stresses in said rods near,

7 the lower end of said shell, means fixedly fas toning said rods to said. shell *near the lower end thereof above said spacing and equalizing means, means slidably connecting sald rods with said shell above; said fixed' fastenings to provide for inequalities" in expansion and contraction-and means on the ends of said rods for adjustable connection tosaid' base. 7

I 12. In a sectional-metal lamp post having I, shaft and top sections, a reinforced shaft seca tion comprising the combination of a tubular shell, a plurality of rods adjacent the inner walls of and projecting from'the ends of said shell, means for spacing and equalizing the stresses in said rods near the lower end of said shell, means fixedly fastening said rods to said shell near the lower'end thereof above said spacing andequalizing means, means slidably connecting said rods with said shellabove said fixed fastenings and means on the e upper ends of said rods to adjustably align and support said top section and to complete a reinforcing cage for the strengthening and support of said tubular shell. i

V 13. In a sectional metal post, a base section,

a-tubular shaft section resting on said base section, a plurality of rods extending lengthwise-along the inner walls-of said post sec tion, guides slidably connecting said rod ,with

Qthe walls'of said post section, means rigidly securing said rods to the walls'of said post section, a tOpsectionnear the lower end thereof, the top ends of said rods and means securing the bottom ends of said rods to th top end of said base section.

Walls of said shell" means within said shell near the lower endthereof for spacing and for equalizing-the stresses in said rods, means fixedly fastening said rods to said 'sheIl'near the lower endthereof above said spacingand equalizing means, means-slidably connecting said rods with said shell above said fixed fastenings to provide for inequalities in expansion and contraction, means on :the lower ends 'ofsaid rods for adjustable connection 14. A sectional. metallam'p post compris ing a base, a tubular shaft mounted on said base, alamp section mounted on said shaft,

a plurality of rods, a peripherally notched v annular member for spacing said rods ad-" jacent the inner walls of said shaft, means fixedly securing said rodsto said shaft and to said annular member and means adjust ablysecuring the lower'ends of said rods to l r the top of said base for the transmission of both tension and compression forces. 7

' 15 Ina: sectional metallamp post, the reinforced s metal a e' ion claimed 211111 3 in anal combination witha 'r ifi.

forced: shaft section ,1 comprising a; tubular shellyaplurality of rods adjacent the inner 

